master
1/*
2 * Copyright (C) 2012 by Darren Reed.
3 *
4 * See the IPFILTER.LICENCE file for details on licencing.
5 *
6 * @(#)ip_nat.h 1.5 2/4/96
7 * Id: ip_nat.h,v 2.90.2.20 2007/09/25 08:27:32 darrenr Exp $
8 */
9
10#ifndef __IP_NAT_H__
11#define __IP_NAT_H__
12
13#ifndef SOLARIS
14# if defined(sun) && defined(__SVR4)
15# define SOLARIS 1
16# else
17# define SOLARIS 0
18# endif
19#endif
20
21#define SIOCADNAT _IOW('r', 60, struct ipfobj)
22#define SIOCRMNAT _IOW('r', 61, struct ipfobj)
23#define SIOCGNATS _IOWR('r', 62, struct ipfobj)
24#define SIOCGNATL _IOWR('r', 63, struct ipfobj)
25#define SIOCPURGENAT _IOWR('r', 100, struct ipfobj)
26
27#undef LARGE_NAT /* define this if you're setting up a system to NAT
28 * LARGE numbers of networks/hosts - i.e. in the
29 * hundreds or thousands. In such a case, you should
30 * also change the RDR_SIZE and NAT_SIZE below to more
31 * appropriate sizes. The figures below were used for
32 * a setup with 1000-2000 networks to NAT.
33 */
34#ifdef NAT_SIZE
35# define NAT_SIZE_LARGE NAT_SIZE
36# define NAT_SIZE_NORMAL NAT_SIZE
37#else
38# define NAT_SIZE_LARGE 2047
39# define NAT_SIZE_NORMAL 127
40#endif
41#ifdef RDR_SIZE
42# define RDR_SIZE_LARGE RDR_SIZE
43# define RDR_SIZE_NORMAL RDR_SIZE
44#else
45# define RDR_SIZE_LARGE 2047
46# define RDR_SIZE_NORMAL 127
47#endif
48#ifdef HOSTMAP_SIZE
49# define HOSTMAP_SIZE_LARGE HOSTMAP_SIZE
50# define HOSTMAP_SIZE_NORMAL HOSTMAP_SIZE
51#else
52# define HOSTMAP_SIZE_LARGE 8191
53# define HOSTMAP_SIZE_NORMAL 2047
54#endif
55/*
56 * This is newly introduced and for the sake of "least surprise", the numbers
57 * present aren't what we'd normally use for creating a proper hash table.
58 */
59#ifdef NAT_TABLE_MAX
60# define NAT_TABLE_MAX_LARGE NAT_TABLE_MAX
61# define NAT_TABLE_MAX_NORMAL NAT_TABLE_MAX
62#else
63# define NAT_TABLE_MAX_LARGE 180000
64# define NAT_TABLE_MAX_NORMAL 30000
65#endif
66#ifdef NAT_TABLE_SZ
67# define NAT_TABLE_SZ_LARGE NAT_TABLE_SZ
68# define NAT_TABLE_SZ_NORMAL NAT_TABLE_SZ
69#else
70# define NAT_TABLE_SZ_LARGE 16383
71# define NAT_TABLE_SZ_NORMAL 2047
72#endif
73#ifndef APR_LABELLEN
74#define APR_LABELLEN 16
75#endif
76#define NAT_HW_CKSUM 0x80000000
77#define NAT_HW_CKSUM_PART 0x40000000
78
79#define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */
80
81struct ipstate;
82struct ap_session;
83
84/*
85 * This structure is used in the active NAT table and represents an
86 * active NAT session.
87 */
88typedef struct nat {
89 ipfmutex_t nat_lock;
90 struct nat *nat_next;
91 struct nat **nat_pnext;
92 struct nat *nat_hnext[2];
93 struct nat **nat_phnext[2];
94 struct hostmap *nat_hm;
95 void *nat_data;
96 struct nat **nat_me;
97 struct ipstate *nat_state;
98 struct ap_session *nat_aps; /* proxy session */
99 frentry_t *nat_fr; /* filter rule ptr if appropriate */
100 struct ipnat *nat_ptr; /* pointer back to the rule */
101 void *nat_ifps[2];
102 void *nat_sync;
103 ipftqent_t nat_tqe;
104 int nat_mtu[2];
105 u_32_t nat_flags;
106 u_32_t nat_sumd[2]; /* ip checksum delta for data segment*/
107 u_32_t nat_ipsumd; /* ip checksum delta for ip header */
108 u_32_t nat_mssclamp; /* if != zero clamp MSS to this */
109 i6addr_t nat_odst6;
110 i6addr_t nat_osrc6;
111 i6addr_t nat_ndst6;
112 i6addr_t nat_nsrc6;
113 U_QUAD_T nat_pkts[2];
114 U_QUAD_T nat_bytes[2];
115 union {
116 udpinfo_t nat_unu;
117 tcpinfo_t nat_unt;
118 icmpinfo_t nat_uni;
119 greinfo_t nat_ugre;
120 } nat_unold, nat_unnew;
121 int nat_use;
122 int nat_pr[2]; /* protocol for NAT */
123 int nat_dir;
124 int nat_ref; /* reference count */
125 u_int nat_hv[2];
126 char nat_ifnames[2][LIFNAMSIZ];
127 int nat_rev; /* 0 = forward, 1 = reverse */
128 int nat_dlocal;
129 int nat_v[2]; /* 0 = old, 1 = new */
130 u_int nat_redir; /* copy of in_redir */
131} nat_t;
132
133#define nat_osrcip nat_osrc6.in4
134#define nat_odstip nat_odst6.in4
135#define nat_nsrcip nat_nsrc6.in4
136#define nat_ndstip nat_ndst6.in4
137#define nat_osrcaddr nat_osrc6.in4.s_addr
138#define nat_odstaddr nat_odst6.in4.s_addr
139#define nat_nsrcaddr nat_nsrc6.in4.s_addr
140#define nat_ndstaddr nat_ndst6.in4.s_addr
141#define nat_age nat_tqe.tqe_die
142#define nat_osport nat_unold.nat_unt.ts_sport
143#define nat_odport nat_unold.nat_unt.ts_dport
144#define nat_nsport nat_unnew.nat_unt.ts_sport
145#define nat_ndport nat_unnew.nat_unt.ts_dport
146#define nat_oicmpid nat_unold.nat_uni.ici_id
147#define nat_nicmpid nat_unnew.nat_uni.ici_id
148#define nat_type nat_unold.nat_uni.ici_type
149#define nat_oseq nat_unold.nat_uni.ici_seq
150#define nat_nseq nat_unnew.nat_uni.ici_seq
151#define nat_tcpstate nat_tqe.tqe_state
152#define nat_die nat_tqe.tqe_die
153#define nat_touched nat_tqe.tqe_touched
154
155/*
156 * Values for nat_dir
157 */
158#define NAT_INBOUND 0
159#define NAT_OUTBOUND 1
160#define NAT_ENCAPIN 2
161#define NAT_ENCAPOUT 3
162#define NAT_DIVERTIN 4
163#define NAT_DIVERTOUT 5
164
165/*
166 * Definitions for nat_flags
167 */
168#define NAT_TCP 0x0001 /* IPN_TCP */
169#define NAT_UDP 0x0002 /* IPN_UDP */
170#define NAT_ICMPERR 0x0004 /* IPN_ICMPERR */
171#define NAT_ICMPQUERY 0x0008 /* IPN_ICMPQUERY */
172#define NAT_SEARCH 0x0010
173#define NAT_SLAVE 0x0020 /* Slave connection for a proxy */
174#define NAT_NOTRULEPORT 0x0040 /* Don't use the port # in the NAT rule */
175
176#define NAT_TCPUDP (NAT_TCP|NAT_UDP)
177#define NAT_TCPUDPICMP (NAT_TCP|NAT_UDP|NAT_ICMPERR)
178#define NAT_TCPUDPICMPQ (NAT_TCP|NAT_UDP|NAT_ICMPQUERY)
179#define NAT_FROMRULE (NAT_TCP|NAT_UDP)
180
181/* 0x0100 reserved for FI_W_SPORT */
182/* 0x0200 reserved for FI_W_DPORT */
183/* 0x0400 reserved for FI_W_SADDR */
184/* 0x0800 reserved for FI_W_DADDR */
185/* 0x1000 reserved for FI_W_NEWFR */
186/* 0x2000 reserved for SI_CLONE */
187/* 0x4000 reserved for SI_CLONED */
188/* 0x8000 reserved for SI_IGNOREPKT */
189
190#define NAT_DEBUG 0x800000
191
192typedef struct nat_addr_s {
193 i6addr_t na_addr[2];
194 i6addr_t na_nextaddr;
195 int na_atype;
196 int na_function;
197} nat_addr_t;
198
199#define na_nextip na_nextaddr.in4.s_addr
200#define na_nextip6 na_nextaddr.in6
201#define na_num na_addr[0].iplookupnum
202#define na_type na_addr[0].iplookuptype
203#define na_subtype na_addr[0].iplookupsubtype
204#define na_ptr na_addr[1].iplookupptr
205#define na_func na_addr[1].iplookupfunc
206
207
208/*
209 * This structure represents an actual NAT rule, loaded by ipnat.
210 */
211typedef struct ipnat {
212 ipfmutex_t in_lock;
213 struct ipnat *in_next; /* NAT rule list next */
214 struct ipnat **in_pnext; /* prior rdr next ptr */
215 struct ipnat *in_rnext; /* rdr rule hash next */
216 struct ipnat **in_prnext; /* prior rdr next ptr */
217 struct ipnat *in_mnext; /* map rule hash next */
218 struct ipnat **in_pmnext; /* prior map next ptr */
219 struct ipftq *in_tqehead[2];
220 void *in_ifps[2];
221 void *in_apr;
222 char *in_comment;
223 mb_t *in_divmp;
224 void *in_pconf;
225 U_QUAD_T in_pkts[2];
226 U_QUAD_T in_bytes[2];
227 u_long in_space;
228 u_long in_hits;
229 int in_size;
230 int in_use;
231 u_int in_hv[2];
232 int in_flineno; /* conf. file line number */
233 int in_stepnext;
234 int in_dlocal;
235 u_short in_dpnext;
236 u_short in_spnext;
237 /* From here to the end is covered by IPN_CMPSIZ */
238 u_char in_v[2]; /* 0 = old, 1 = new */
239 u_32_t in_flags;
240 u_32_t in_mssclamp; /* if != 0 clamp MSS to this */
241 u_int in_age[2];
242 int in_redir; /* see below for values */
243 int in_pr[2]; /* protocol. */
244 nat_addr_t in_ndst;
245 nat_addr_t in_nsrc;
246 nat_addr_t in_osrc;
247 nat_addr_t in_odst;
248 frtuc_t in_tuc;
249 u_short in_ppip; /* ports per IP. */
250 u_short in_ippip; /* IP #'s per IP# */
251 u_short in_ndports[2];
252 u_short in_nsports[2];
253 int in_ifnames[2];
254 int in_plabel; /* proxy label. */
255 int in_pconfig; /* proxy label. */
256 ipftag_t in_tag;
257 int in_namelen;
258 char in_names[1];
259} ipnat_t;
260
261/*
262 * MAP-IN MAP-OUT RDR-IN RDR-OUT
263 * osrc X == src == src X
264 * odst X == dst == dst X
265 * nsrc == dst X X == dst
266 * ndst == src X X == src
267 */
268#define in_dpmin in_ndports[0] /* Also holds static redir port */
269#define in_dpmax in_ndports[1]
270#define in_spmin in_nsports[0] /* Also holds static redir port */
271#define in_spmax in_nsports[1]
272#define in_ndport in_ndports[0]
273#define in_nsport in_nsports[0]
274#define in_dipnext in_ndst.na_nextaddr.in4
275#define in_dipnext6 in_ndst.na_nextaddr
276#define in_dnip in_ndst.na_nextaddr.in4.s_addr
277#define in_dnip6 in_ndst.na_nextaddr
278#define in_sipnext in_nsrc.na_nextaddr.in4
279#define in_snip in_nsrc.na_nextaddr.in4.s_addr
280#define in_snip6 in_nsrc.na_nextaddr
281#define in_odstip in_odst.na_addr[0].in4
282#define in_odstip6 in_odst.na_addr[0]
283#define in_odstaddr in_odst.na_addr[0].in4.s_addr
284#define in_odstmsk in_odst.na_addr[1].in4.s_addr
285#define in_odstmsk6 in_odst.na_addr[1]
286#define in_odstatype in_odst.na_atype
287#define in_osrcip in_osrc.na_addr[0].in4
288#define in_osrcip6 in_osrc.na_addr[0]
289#define in_osrcaddr in_osrc.na_addr[0].in4.s_addr
290#define in_osrcmsk in_osrc.na_addr[1].in4.s_addr
291#define in_osrcmsk6 in_osrc.na_addr[1]
292#define in_osrcatype in_osrc.na_atype
293#define in_ndstip in_ndst.na_addr[0].in4
294#define in_ndstip6 in_ndst.na_addr[0]
295#define in_ndstaddr in_ndst.na_addr[0].in4.s_addr
296#define in_ndstmsk in_ndst.na_addr[1].in4.s_addr
297#define in_ndstmsk6 in_ndst.na_addr[1]
298#define in_ndstatype in_ndst.na_atype
299#define in_ndstafunc in_ndst.na_function
300#define in_nsrcip in_nsrc.na_addr[0].in4
301#define in_nsrcip6 in_nsrc.na_addr[0]
302#define in_nsrcaddr in_nsrc.na_addr[0].in4.s_addr
303#define in_nsrcmsk in_nsrc.na_addr[1].in4.s_addr
304#define in_nsrcmsk6 in_nsrc.na_addr[1]
305#define in_nsrcatype in_nsrc.na_atype
306#define in_nsrcafunc in_nsrc.na_function
307#define in_scmp in_tuc.ftu_scmp
308#define in_dcmp in_tuc.ftu_dcmp
309#define in_stop in_tuc.ftu_stop
310#define in_dtop in_tuc.ftu_dtop
311#define in_osport in_tuc.ftu_sport
312#define in_odport in_tuc.ftu_dport
313#define in_ndstnum in_ndst.na_addr[0].iplookupnum
314#define in_ndsttype in_ndst.na_addr[0].iplookuptype
315#define in_ndstptr in_ndst.na_addr[1].iplookupptr
316#define in_ndstfunc in_ndst.na_addr[1].iplookupfunc
317#define in_nsrcnum in_nsrc.na_addr[0].iplookupnum
318#define in_nsrctype in_nsrc.na_addr[0].iplookuptype
319#define in_nsrcptr in_nsrc.na_addr[1].iplookupptr
320#define in_nsrcfunc in_nsrc.na_addr[1].iplookupfunc
321#define in_odstnum in_odst.na_addr[0].iplookupnum
322#define in_odsttype in_odst.na_addr[0].iplookuptype
323#define in_odstptr in_odst.na_addr[1].iplookupptr
324#define in_odstfunc in_odst.na_addr[1].iplookupfunc
325#define in_osrcnum in_osrc.na_addr[0].iplookupnum
326#define in_osrctype in_osrc.na_addr[0].iplookuptype
327#define in_osrcptr in_osrc.na_addr[1].iplookupptr
328#define in_osrcfunc in_osrc.na_addr[1].iplookupfunc
329#define in_icmpidmin in_nsports[0]
330#define in_icmpidmax in_nsports[1]
331
332/*
333 * Bit definitions for in_flags
334 */
335#define IPN_ANY 0x00000
336#define IPN_TCP 0x00001
337#define IPN_UDP 0x00002
338#define IPN_TCPUDP (IPN_TCP|IPN_UDP)
339#define IPN_ICMPERR 0x00004
340#define IPN_TCPUDPICMP (IPN_TCP|IPN_UDP|IPN_ICMPERR)
341#define IPN_ICMPQUERY 0x00008
342#define IPN_TCPUDPICMPQ (IPN_TCP|IPN_UDP|IPN_ICMPQUERY)
343#define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR)
344#define IPN_AUTOPORTMAP 0x00010
345#define IPN_FILTER 0x00020
346#define IPN_SPLIT 0x00040
347#define IPN_ROUNDR 0x00080
348#define IPN_SIPRANGE 0x00100
349#define IPN_DIPRANGE 0x00200
350#define IPN_NOTSRC 0x00400
351#define IPN_NOTDST 0x00800
352#define IPN_NO 0x01000
353#define IPN_DYNSRCIP 0x02000 /* dynamic src IP# */
354#define IPN_DYNDSTIP 0x04000 /* dynamic dst IP# */
355#define IPN_DELETE 0x08000
356#define IPN_STICKY 0x10000
357#define IPN_FRAG 0x20000
358#define IPN_FIXEDSPORT 0x40000
359#define IPN_FIXEDDPORT 0x80000
360#define IPN_FINDFORWARD 0x100000
361#define IPN_IN 0x200000
362#define IPN_SEQUENTIAL 0x400000
363#define IPN_PURGE 0x800000
364#define IPN_PROXYRULE 0x1000000
365#define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_SIPRANGE|IPN_SPLIT|\
366 IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST|IPN_NO|\
367 IPN_FRAG|IPN_STICKY|IPN_FIXEDDPORT|IPN_ICMPQUERY|\
368 IPN_DIPRANGE|IPN_SEQUENTIAL|IPN_PURGE)
369
370/*
371 * Values for in_redir
372 */
373#define NAT_MAP 0x01
374#define NAT_REDIRECT 0x02
375#define NAT_BIMAP (NAT_MAP|NAT_REDIRECT)
376#define NAT_MAPBLK 0x04
377#define NAT_REWRITE 0x08
378#define NAT_ENCAP 0x10
379#define NAT_DIVERTUDP 0x20
380
381#define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */
382#define USABLE_PORTS (65536 - MAPBLK_MINPORT)
383
384#define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_v))
385
386typedef struct natlookup {
387 i6addr_t nl_inipaddr;
388 i6addr_t nl_outipaddr;
389 i6addr_t nl_realipaddr;
390 int nl_v;
391 int nl_flags;
392 u_short nl_inport;
393 u_short nl_outport;
394 u_short nl_realport;
395} natlookup_t;
396
397#define nl_inip nl_inipaddr.in4
398#define nl_outip nl_outipaddr.in4
399#define nl_realip nl_realipaddr.in4
400#define nl_inip6 nl_inipaddr.in6
401#define nl_outip6 nl_outipaddr.in6
402#define nl_realip6 nl_realipaddr.in6
403
404
405typedef struct nat_save {
406 void *ipn_next;
407 struct nat ipn_nat;
408 struct ipnat ipn_ipnat;
409 struct frentry ipn_fr;
410 int ipn_dsize;
411 char ipn_data[4];
412} nat_save_t;
413
414#define ipn_rule ipn_nat.nat_fr
415
416typedef struct natget {
417 void *ng_ptr;
418 int ng_sz;
419} natget_t;
420
421
422/*
423 * This structure gets used to help NAT sessions keep the same NAT rule (and
424 * thus translation for IP address) when:
425 * (a) round-robin redirects are in use
426 * (b) different IP add
427 */
428typedef struct hostmap {
429 struct hostmap *hm_hnext;
430 struct hostmap **hm_phnext;
431 struct hostmap *hm_next;
432 struct hostmap **hm_pnext;
433 struct ipnat *hm_ipnat;
434 i6addr_t hm_osrcip6;
435 i6addr_t hm_odstip6;
436 i6addr_t hm_nsrcip6;
437 i6addr_t hm_ndstip6;
438 u_32_t hm_port;
439 int hm_ref;
440 int hm_hv;
441 int hm_v;
442} hostmap_t;
443
444#define hm_osrcip hm_osrcip6.in4
445#define hm_odstip hm_odstip6.in4
446#define hm_nsrcip hm_nsrcip6.in4
447#define hm_ndstip hm_ndstip6.in4
448#define hm_osrc6 hm_osrcip6.in6
449#define hm_odst6 hm_odstip6.in6
450#define hm_nsrc6 hm_nsrcip6.in6
451#define hm_ndst6 hm_ndstip6.in6
452
453
454/*
455 * Structure used to pass information in to nat_newmap and nat_newrdr.
456 */
457typedef struct natinfo {
458 ipnat_t *nai_np;
459 u_32_t nai_sum1;
460 u_32_t nai_sum2;
461 struct in_addr nai_ip; /* In host byte order */
462 u_short nai_port;
463 u_short nai_nport;
464 u_short nai_sport;
465 u_short nai_dport;
466} natinfo_t;
467
468
469typedef struct nat_stat_side {
470 u_int *ns_bucketlen;
471 nat_t **ns_table;
472 u_long ns_added;
473 u_long ns_appr_fail;
474 u_long ns_badnat;
475 u_long ns_badnatnew;
476 u_long ns_badnextaddr;
477 u_long ns_bucket_max;
478 u_long ns_clone_nomem;
479 u_long ns_decap_bad;
480 u_long ns_decap_fail;
481 u_long ns_decap_pullup;
482 u_long ns_divert_dup;
483 u_long ns_divert_exist;
484 u_long ns_drop;
485 u_long ns_encap_dup;
486 u_long ns_encap_pullup;
487 u_long ns_exhausted;
488 u_long ns_icmp_address;
489 u_long ns_icmp_basic;
490 u_long ns_icmp_mbuf;
491 u_long ns_icmp_notfound;
492 u_long ns_icmp_rebuild;
493 u_long ns_icmp_short;
494 u_long ns_icmp_size;
495 u_long ns_ifpaddrfail;
496 u_long ns_ignored;
497 u_long ns_insert_fail;
498 u_long ns_inuse;
499 u_long ns_log;
500 u_long ns_lookup_miss;
501 u_long ns_lookup_nowild;
502 u_long ns_new_ifpaddr;
503 u_long ns_memfail;
504 u_long ns_table_max;
505 u_long ns_translated;
506 u_long ns_unfinalised;
507 u_long ns_wrap;
508 u_long ns_xlate_null;
509 u_long ns_xlate_exists;
510 u_long ns_ipf_proxy_fail;
511 u_long ns_uncreate[2];
512} nat_stat_side_t;
513
514
515typedef struct natstat {
516 nat_t *ns_instances;
517 ipnat_t *ns_list;
518 hostmap_t *ns_maplist;
519 hostmap_t **ns_maptable;
520 u_int ns_active;
521 u_long ns_addtrpnt;
522 u_long ns_divert_build;
523 u_long ns_expire;
524 u_long ns_flush_all;
525 u_long ns_flush_closing;
526 u_long ns_flush_queue;
527 u_long ns_flush_state;
528 u_long ns_flush_timeout;
529 u_long ns_hm_new;
530 u_long ns_hm_newfail;
531 u_long ns_hm_addref;
532 u_long ns_hm_nullnp;
533 u_long ns_log_ok;
534 u_long ns_log_fail;
535 u_int ns_hostmap_sz;
536 u_int ns_nattab_sz;
537 u_int ns_nattab_max;
538 u_int ns_orphans;
539 u_int ns_rules;
540 u_int ns_rules_map;
541 u_int ns_rules_rdr;
542 u_int ns_rultab_sz;
543 u_int ns_rdrtab_sz;
544 u_32_t ns_ticks;
545 u_int ns_trpntab_sz;
546 u_int ns_wilds;
547 u_long ns_proto[256];
548 nat_stat_side_t ns_side[2];
549#ifdef USE_INET6
550 nat_stat_side_t ns_side6[2];
551#endif
552} natstat_t;
553
554typedef struct natlog {
555 i6addr_t nl_osrcip;
556 i6addr_t nl_odstip;
557 i6addr_t nl_nsrcip;
558 i6addr_t nl_ndstip;
559 u_short nl_osrcport;
560 u_short nl_odstport;
561 u_short nl_nsrcport;
562 u_short nl_ndstport;
563 int nl_action;
564 int nl_type;
565 int nl_rule;
566 U_QUAD_T nl_pkts[2];
567 U_QUAD_T nl_bytes[2];
568 u_char nl_p[2];
569 u_char nl_v[2];
570 u_char nl_ifnames[2][LIFNAMSIZ];
571} natlog_t;
572
573
574#define NL_NEW 0
575#define NL_CLONE 1
576#define NL_PURGE 0xfffc
577#define NL_DESTROY 0xfffd
578#define NL_FLUSH 0xfffe
579#define NL_EXPIRE 0xffff
580
581#define NAT_HASH_FN(_k,_l,_m) (((_k) + ((_k) >> 12) + _l) % (_m))
582#define NAT_HASH_FN6(_k,_l,_m) ((((u_32_t *)(_k))[3] \
583 + (((u_32_t *)(_k))[3] >> 12) \
584 + (((u_32_t *)(_k))[2]) \
585 + (((u_32_t *)(_k))[2] >> 12) \
586 + (((u_32_t *)(_k))[1]) \
587 + (((u_32_t *)(_k))[1] >> 12) \
588 + (((u_32_t *)(_k))[0]) \
589 + (((u_32_t *)(_k))[0] >> 12) \
590 + _l) % (_m))
591
592#define LONG_SUM(_i) (((_i) & 0xffff) + ((_i) >> 16))
593#define LONG_SUM6(_i) (LONG_SUM(ntohl(((u_32_t *)(_i))[0])) + \
594 LONG_SUM(ntohl(((u_32_t *)(_i))[1])) + \
595 LONG_SUM(ntohl(((u_32_t *)(_i))[2])) + \
596 LONG_SUM(ntohl(((u_32_t *)(_i))[3])))
597
598#define CALC_SUMD(s1, s2, sd) { \
599 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \
600 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \
601 /* Do it twice */ \
602 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \
603 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \
604 /* Because ~1 == -2, We really need ~1 == -1 */ \
605 if ((s1) > (s2)) (s2)--; \
606 (sd) = (s2) - (s1); \
607 (sd) = ((sd) & 0xffff) + ((sd) >> 16); }
608
609#define NAT_SYSSPACE 0x80000000
610#define NAT_LOCKHELD 0x40000000
611
612/*
613 * This is present in ip_nat.h because it needs to be shared between
614 * ip_nat.c and ip_nat6.c
615 */
616typedef struct ipf_nat_softc_s {
617 ipfmutex_t ipf_nat_new;
618 ipfmutex_t ipf_nat_io;
619 int ipf_nat_doflush;
620 int ipf_nat_logging;
621 int ipf_nat_lock;
622 int ipf_nat_inited;
623 int ipf_nat_table_wm_high;
624 int ipf_nat_table_wm_low;
625 u_int ipf_nat_table_max;
626 u_int ipf_nat_table_sz;
627 u_int ipf_nat_maprules_sz;
628 u_int ipf_nat_rdrrules_sz;
629 u_int ipf_nat_hostmap_sz;
630 u_int ipf_nat_maxbucket;
631 u_int ipf_nat_last_force_flush;
632 u_int ipf_nat_defage;
633 u_int ipf_nat_defipage;
634 u_int ipf_nat_deficmpage;
635 ipf_v4_masktab_t ipf_nat_map_mask;
636 ipf_v6_masktab_t ipf_nat6_map_mask;
637 ipf_v4_masktab_t ipf_nat_rdr_mask;
638 ipf_v6_masktab_t ipf_nat6_rdr_mask;
639 nat_t **ipf_nat_table[2];
640 nat_t *ipf_nat_instances;
641 ipnat_t *ipf_nat_list;
642 ipnat_t **ipf_nat_list_tail;
643 ipnat_t **ipf_nat_map_rules;
644 ipnat_t **ipf_nat_rdr_rules;
645 ipftq_t *ipf_nat_utqe;
646 hostmap_t **ipf_hm_maptable ;
647 hostmap_t *ipf_hm_maplist ;
648 ipftuneable_t *ipf_nat_tune;
649 ipftq_t ipf_nat_udptq;
650 ipftq_t ipf_nat_udpacktq;
651 ipftq_t ipf_nat_icmptq;
652 ipftq_t ipf_nat_icmpacktq;
653 ipftq_t ipf_nat_iptq;
654 ipftq_t ipf_nat_pending;
655 ipftq_t ipf_nat_tcptq[IPF_TCP_NSTATES];
656 natstat_t ipf_nat_stats;
657} ipf_nat_softc_t ;
658
659#define ipf_nat_map_max ipf_nat_map_mask.imt4_max
660#define ipf_nat_rdr_max ipf_nat_rdr_mask.imt4_max
661#define ipf_nat6_map_max ipf_nat6_map_mask.imt6_max
662#define ipf_nat6_rdr_max ipf_nat6_rdr_mask.imt6_max
663#define ipf_nat_map_active_masks ipf_nat_map_mask.imt4_active
664#define ipf_nat_rdr_active_masks ipf_nat_rdr_mask.imt4_active
665#define ipf_nat6_map_active_masks ipf_nat6_map_mask.imt6_active
666#define ipf_nat6_rdr_active_masks ipf_nat6_rdr_mask.imt6_active
667
668extern frentry_t ipfnatblock;
669
670extern void ipf_fix_datacksum(u_short *, u_32_t);
671extern void ipf_fix_incksum(int, u_short *, u_32_t, u_32_t);
672extern void ipf_fix_outcksum(int, u_short *, u_32_t, u_32_t);
673
674extern int ipf_nat_checkin(fr_info_t *, u_32_t *);
675extern int ipf_nat_checkout(fr_info_t *, u_32_t *);
676extern void ipf_nat_delete(ipf_main_softc_t *, struct nat *, int);
677extern void ipf_nat_deref(ipf_main_softc_t *, nat_t **);
678extern void ipf_nat_expire(ipf_main_softc_t *);
679extern int ipf_nat_hashtab_add(ipf_main_softc_t *,
680 ipf_nat_softc_t *, nat_t *);
681extern void ipf_nat_hostmapdel(ipf_main_softc_t *, hostmap_t **);
682extern int ipf_nat_hostmap_rehash(ipf_main_softc_t *,
683 ipftuneable_t *, ipftuneval_t *);
684extern nat_t *ipf_nat_icmperrorlookup(fr_info_t *, int);
685extern nat_t *ipf_nat_icmperror(fr_info_t *, u_int *, int);
686extern int ipf_nat_init(void);
687extern nat_t *ipf_nat_inlookup(fr_info_t *, u_int, u_int,
688 struct in_addr, struct in_addr);
689extern int ipf_nat_in(fr_info_t *, nat_t *, int, u_32_t);
690extern int ipf_nat_insert(ipf_main_softc_t *, ipf_nat_softc_t *,
691 nat_t *);
692extern int ipf_nat_ioctl(ipf_main_softc_t *, caddr_t, ioctlcmd_t,
693 int, int, void *);
694extern void ipf_nat_log(ipf_main_softc_t *, ipf_nat_softc_t *,
695 struct nat *, u_int);
696extern nat_t *ipf_nat_lookupredir(natlookup_t *);
697extern nat_t *ipf_nat_maplookup(void *, u_int, struct in_addr,
698 struct in_addr);
699extern nat_t *ipf_nat_add(fr_info_t *, ipnat_t *, nat_t **,
700 u_int, int);
701extern int ipf_nat_out(fr_info_t *, nat_t *, int, u_32_t);
702extern nat_t *ipf_nat_outlookup(fr_info_t *, u_int, u_int,
703 struct in_addr, struct in_addr);
704extern u_short *ipf_nat_proto(fr_info_t *, nat_t *, u_int);
705extern void ipf_nat_rule_deref(ipf_main_softc_t *, ipnat_t **);
706extern void ipf_nat_setqueue(ipf_main_softc_t *, ipf_nat_softc_t *,
707 nat_t *);
708extern void ipf_nat_setpending(ipf_main_softc_t *, nat_t *);
709extern nat_t *ipf_nat_tnlookup(fr_info_t *, int);
710extern void ipf_nat_update(fr_info_t *, nat_t *);
711extern int ipf_nat_rehash(ipf_main_softc_t *, ipftuneable_t *,
712 ipftuneval_t *);
713extern int ipf_nat_rehash_rules(ipf_main_softc_t *, ipftuneable_t *,
714 ipftuneval_t *);
715extern int ipf_nat_settimeout(struct ipf_main_softc_s *,
716 ipftuneable_t *, ipftuneval_t *);
717extern void ipf_nat_sync(ipf_main_softc_t *, void *);
718
719extern nat_t *ipf_nat_clone(fr_info_t *, nat_t *);
720extern void ipf_nat_delmap(ipf_nat_softc_t *, ipnat_t *);
721extern void ipf_nat_delrdr(ipf_nat_softc_t *, ipnat_t *);
722extern int ipf_nat_wildok(nat_t *, int, int, int, int);
723extern void ipf_nat_setlock(void *, int);
724extern void ipf_nat_load(void);
725extern void *ipf_nat_soft_create(ipf_main_softc_t *);
726extern int ipf_nat_soft_init(ipf_main_softc_t *, void *);
727extern void ipf_nat_soft_destroy(ipf_main_softc_t *, void *);
728extern int ipf_nat_soft_fini(ipf_main_softc_t *, void *);
729extern int ipf_nat_main_load(void);
730extern int ipf_nat_main_unload(void);
731extern ipftq_t *ipf_nat_add_tq(ipf_main_softc_t *, int);
732extern void ipf_nat_uncreate(fr_info_t *);
733
734#ifdef USE_INET6
735extern nat_t *ipf_nat6_add(fr_info_t *, ipnat_t *, nat_t **,
736 u_int, int);
737extern void ipf_nat6_addrdr(ipf_nat_softc_t *, ipnat_t *);
738extern void ipf_nat6_addmap(ipf_nat_softc_t *, ipnat_t *);
739extern void ipf_nat6_addencap(ipf_nat_softc_t *, ipnat_t *);
740extern int ipf_nat6_checkout(fr_info_t *, u_32_t *);
741extern int ipf_nat6_checkin(fr_info_t *, u_32_t *);
742extern void ipf_nat6_delmap(ipf_nat_softc_t *, ipnat_t *);
743extern void ipf_nat6_delrdr(ipf_nat_softc_t *, ipnat_t *);
744extern int ipf_nat6_finalise(fr_info_t *, nat_t *);
745extern nat_t *ipf_nat6_icmperror(fr_info_t *, u_int *, int);
746extern nat_t *ipf_nat6_icmperrorlookup(fr_info_t *, int);
747extern nat_t *ipf_nat6_inlookup(fr_info_t *, u_int, u_int,
748 struct in6_addr *, struct in6_addr *);
749extern u_32_t ipf_nat6_ip6subtract(i6addr_t *, i6addr_t *);
750extern frentry_t *ipf_nat6_ipfin(fr_info_t *, u_32_t *);
751extern frentry_t *ipf_nat6_ipfout(fr_info_t *, u_32_t *);
752extern nat_t *ipf_nat6_lookupredir(natlookup_t *);
753extern int ipf_nat6_newmap(fr_info_t *, nat_t *, natinfo_t *);
754extern int ipf_nat6_newrdr(fr_info_t *, nat_t *, natinfo_t *);
755extern nat_t *ipf_nat6_outlookup(fr_info_t *, u_int, u_int,
756 struct in6_addr *, struct in6_addr *);
757extern int ipf_nat6_newrewrite(fr_info_t *, nat_t *, natinfo_t *);
758extern int ipf_nat6_newdivert(fr_info_t *, nat_t *, natinfo_t *);
759extern int ipf_nat6_ruleaddrinit(ipf_main_softc_t *, ipf_nat_softc_t *, ipnat_t *);
760
761#endif
762
763
764#endif /* __IP_NAT_H__ */